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 A171765 a(n) = 0 if n <= 10; for n >= 11, a(n) = product of digits of n. 7
 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 0, 3, 6, 9, 12, 15, 18, 21, 24, 27, 0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 0, 6, 12, 18, 24, 30, 36, 42, 48, 54, 0, 7, 14, 21, 28, 35, 42, 49, 56, 63, 0, 8, 16, 24, 32, 40, 48, 56, 64, 72, 0, 9, 18, 27, 36, 45, 54, 63, 72, 81, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,13 LINKS MAPLE A171765 := proc(n)     if n<= 10 then         0;     else         A007954(n);     end if: end proc: # R. J. Mathar, Jan 11 2020 MATHEMATICA Table[If[n<11, 0, Times@@IntegerDigits[n]], {n, 0, 100}] (* Harvey P. Dale, Aug 02 2016 *) PROG (PARI) a(n)=if(n<=9, 0, n=digits(n); prod(i=1, #n, n[i])) \\ Charles R Greathouse IV, Aug 25 2014 CROSSREFS Cf. A007954. Sequence in context: A330633 A257850 A080464 * A257297 A035930 A195833 Adjacent sequences:  A171762 A171763 A171764 * A171766 A171767 A171768 KEYWORD nonn,base,easy AUTHOR Felice Russo, Oct 11 2010 STATUS approved

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Last modified November 25 05:34 EST 2020. Contains 338617 sequences. (Running on oeis4.)